Oven light



G. HERBSTER OVEN LIGHT Filed Feb. 23, 1954 INV EN TOR.

m'y WI BY 9 M ATTORNEY-S.

Patented Feb. 26, 1935 UNITED STATES PATENT OFFICE OVEN LIGHT GeorgeHer-betel, Cleveland, Ohio, aloignor to The Cleveland Cooperative StoveCompany, Cleveland, Ohio, a corporation of Ohio Application February 28,1934, Serial No. 712,602

6 Claims. (Cl. 240-5) This invention relates to a device forilluminatopening of the oven door and is extinguished consequent uponclosing of the oven door whereby the life of the light bulb is increasedand a saving in electric power is effected.

In order that the oven may be well lighted and shadows eliminated itisdesirable that the light bulb protrude into the interior of the ovenand a more specific object therefore is to mount a bulb in this mannerand yet at the same time maintain the bulb shank and electric powersocket associated therewith at a suiliciently low degree of temperatureto prevent deterioration and to effect this result by conducting theheat of the oven away from the bulb and socket through a metallicconducting medium and concurrently conveying away the heat bycirculation thereabout of outside air.

Other objects and advantages will become ap parent from the followingspecification wherein reference is made to the drawing in which Fig. 1is a side elevation of a gas range oven showing the relative position ofthe elements 01 the present invention;

Fig. 2 is a fragmentary vertical sectional view through a wall of the,oven and the device of the present invention;

Fig. 3 is a back end elevation of the device illustrated.in F18. 2; and

Fig. 4 is a fragmentary side elevation of the control switch and theoperating mechanism therefor.

Referring to Figs. 1 and 2, there is illustrated a gas range having an.oven 0, closed at the front by the usual drop door D and at the sidesand rear by the usual heat insulating walls arranged, for example, inthe same manner as the rear wall shown in section in Figs. 1 and 2. Thisrear wall comprises an inner wall or lining A and an outer wall B,spaced apart therefrom and a partition wall disposed therebetween andspaced from both, a core E of asbestos or other suitable heat insulatingmaterial being provided between the partition wall wall B.

In order to illuminate the interior of the oven eflic iently and withoutshadows it is desirable that the electric light bulb protrude beyond theC and the outer' inner. wall A into the interior of the oven a distancesuflicient to expose'the filament of the )REISSUED bulb entirely withinthe limits of the oven interior. An electric light bulb l of theusualtype is shown as so positioned in Figs. 1 and 2, the filament 1abeing exposed entirely within the oven. The bulb is preferablypositioned in the rear of the oven compartment and near the ceilingthereof so as to. light the interior of receptacles in the oven and maybe protected by an enclosing transparent shield, if desired.

The heat of the interior of ovens, however, is of such a high degree asto deleteriously affect the bulb, especially the bulb shank 10, which isscrewed into the electric socket. Not only does the heating of the shankmelt the sealing wax therein and permit escape of the inert gases withinthe bulb but also melts the solder contacts on the shank. It isnecessary, therefore, that these portions of the bulb be kept relativelycool. In order to accomplish this result an electric socket 2 isarranged on the outside of the oven compartment in a position to receivethe bulb shank 1c and supply power to the bulb when the bulb is in theposition described. Thus the socket is exposed to the cooler air outsideof the oven, circulation of air thereabout being effected in a mannerlater to be described.

For mounting the light and socket and cooling the same, a housing 3 isprovided, the housing preferably being in form of a cup of eflicientheat conducting material, such as copper or cast iron. In the formshown, the housing is provided with an end wall 4 and is open at theopposite end to admit outside air, Aligned openings are provided in thewalls A, B and C of the rear wall oi-the oven and arranged to snuglyreceive the housing endwise with the end wall 4 of the housingpreferably disposed in the plane 0! the inner surface of the wall A soas to receive the oven heat adjacent the housing and conduct it away. Anopening is also provided in the end wall 4 of the housing to permit thebulb to extend therethrough. Mounted within the housing and in spacedrelation to the side and end walls thereof is an electric light socketikconnected in the usual manner to a suitable source of power. Aconvenient mounting for the socket comprises a strap 5 secured to thesocket and, at its ends, secured o the housing 3 so as to support thesocket o t of contact with any of the walls of the housing. The socketis preferably disposed a sufllcie'nt distance back from the end wall 4so that," when the bulb 1 is mounted therein, the shank of the bulb isentirely within the interior A shield 6 of suitable heat insulatingmaterial is provided within the housing and forms a lining 6 for thewalls thereof. The shield has an opening for the passage of the bulbshank therethrough, this opening preferably being of such size that theedges of the shield defining the opening engage the bulb close to theshank and thereby prevent direct radiation of any considerable amount ofheat through the opening of the wall 4 to the shank. The floor wall 3aof the housing preferably slopes downwardly away from the oven towardthe outside so that air may readily enter, as indicated by the arrows 7,and flow upwardly through the interior of the housing and out again nearthe top. Thus the socket and shank of the bulb are continuously bathedin fresh, relatively cool air, circulation being maintained byconvection currents resulting from the heat dissipated from the shank,socket and housing. Since the walls B and C have an apprethe oven dooris opened and to extinguish the bulb automatically consequent-uponclosing of the oven door, a suitable snap switch 8 is provided, thisswitch being connected in series with the socket and with a source ofpower in the usual manner. Mounted within the oven is an operating leveror rod 9, one end of which, indicated at 10, protrudes from the forwardwall of the stove in position to be engaged and moved axially rearwardlyby the oven door when the door is closed, The rod extends through theoven and out through the rear wall, on the outside of which is mountedthe switch 8. A suitable bracket 11 is provided on the rear wall B tosupport the switch and to slidably mount the opposite end of the rod.Mounted on the rod 9,

' intermediate the wall B and the outermost arm the oven door and beingoperable when the oven v door is opened to return the rod forwardly ortoward .the left. The switch lever is so arranged that upon movement ofthe rod rearwardly the switch is opened and, upon return of the rod 9 tothe left, is closed. Consequently the light is turned on when the ovendoor is opened and is extinguished immediately upon closing. of thedoor. The switch, being maintained on the outside of the oven, is notafiected by the oven heat.

Experience has proven that a light mounted in the manner hereindescribed will not be heated to a suflicient degree of temperature to bedeleteriously affected even under continuous operation of the oven foran interval of severa days, but will be heated slightly and thereafterbe maintained at a constant safe temperature.

Having thus described my invention,

I claim:

1. In a domestic cooking range having an oven, an electric light bulbprotruding within the interior limits of the -oven through a-wallthereof for illuminating the interior from a point within and beingdirectly exposed to the heat in the oven, an electric socket carried bythe range for supporting said bulb and for conducting electrical powerthereto, said socket while supporting the bulb in its operating positionbeing disposed outside of the-oven and directly exposed to the cooleroutside atmosphere whereby the socket and parts of the bulb receivedthereby are undamaged by heat from the oven.

2. In a cooking oven, an electric light bulb protruding within theinterior limits of the oven through a wall thereof, means for supplyingelectric current to the bulb, and means for supporting the bulb in saidoperating position, a shank portion of the bulb, when the bulb is inoperating position, being disposed outside of the oven and exposeddirectly to the cooler outside air, where- 'by the parts of the bulb areundamaged by heat from the oven.

3. In a cooking range, having an oven, a wall of said oven having anopening therein, a housing having a wall of heat conducting material andan opening through its said wall, said housing being mounted outside ofthe oven with its said wall exposed to the heat of the oven, theinterior of the housing being open to the atmosphere, an electric lightsocket mounted in said housing in spaced relation to the side wallsthereof, an electric light bulb mounted in said socket and protrudingthrough said openings into the oven, said socket being positionedrelative to said housing so that only the glass portion of the bulbprotrudes into the oven, whereby the shank of the bulb and the socketare kept at a relatively low temperature, and a shield of heatinsulating material disposed between the socket and walls of thehousing.

4. In a cooking stove oven having spaced inner and outer rear walls,aligned openings in said walls, a housing comprising a rigid cup snuglyfitting into said outer wall opening and bridging the space between thewalls, the end wall of the cup being disposed substantially in the planeof the inner rear wall of the oven and having an opening aligned withthe opening in the inner rear wall, the open end of the housing beingopen to the atmosphere, an electric light socket carried in said housingin spaced relation to the walls thereof, a light bulb mounted in saidsocket and protruding through said end wall opening into the oven, andmeans to direct air entering said housing from the outside atmospherearound and into intimate contact with said socket.

5. In a cooking range having an oven, a wall of said oven having anopening therein, housing means having a heat insulating end wall and anopening through its said wall, said housing being mounted outside of theoven compartment, with its said wall exposed to the heat of the oven,

the interior of the housing being open to the atmosphere, an electriclight socket mounted in said housing in spaced relation to the sidewalls thereof, an electric light bulb mounted in said socket andprotruding through said openings into the oven, said socket beingpositioned relative to said housing so that only the glass portion ofthe bulb protrudes into the oven whereby the shank 01' the bulb and thesocket are kept at a relatively low temperature, the opening throughsaid heat insulating end wall of the housing being such that theedges'deflning the opening substantially embrace the bulb glass adjacentthe shank for reducing radiation and convection of heat from the oven tothe said shank.

6. In a domestic cooking range having an oven, an electric light bulbprotruding within the in- 10 terior limits of the oven through a wallthereof GEORGE HERBSTER. 10

